Patent US2860192A successfully refreshed from Google Patents.
US2860192A
Expired / Lapsed
US
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Amplifiers
Assignee: Individual
•
Filing: 1953-05-01
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Granted: 1958-11-11
•
Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
- 👤 Frank H Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:35
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26; H03F3/28; H03F3/50; H03F3/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR892851A
Cited
US2452563A
Cited
US2516672A
Cited
US2446025A
Cited
US2477074A
Cited
US2646467A
Cited
US2648727A
Cited
US2770686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |